 From 1913 until its demise in 1976, all clubs who were members of the Irish League competed for the City Cup (excluding the war years).During 1915 to 1919, the City Cup was known as the Belfast City Cup and reverted to being a Belfast-only competition and is not recognised as an "official" competition for this period; and during 1940 to 1947, it was not played at all.The format for the City Cup varied throughout its history, but most commonly it was organised on a league basis, by which each participating club played each other and the team with the most points won the cup.